Incumbent Democrat Gary Peters' retirement has created an open Michigan Senate seat in this battleground state, rated a tossup by forecasters like Cook Political Report amid a Republican Senate majority and Trump's 2024 presidential win here. Yet trader consensus prices a Democratic victory at 83%, driven by historical midterm headwinds for the president's party—GOP losses averaged 3.5 Senate seats in recent cycles—and Democrats' streak of three straight Michigan Senate wins, including Elissa Slotkin's 2024 triumph over Mike Rogers. Recent March polls show a tight Democratic primary among Rep. Haley Stevens (27%), Sen. Mallory McMorrow (25%), and Abdul El-Sayed (23%) ahead of the August 4 contest, with general hypotheticals narrowly favoring or tying leading Democrats against Rogers. Fundraising remains competitive, with no major shifts in the past 30 days.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMichigan Senate Election Winner
Michigan Senate Election Winner
$102,428 Vol.
$102,428 Vol.

Democrat
83%

Republican
18%
$102,428 Vol.
$102,428 Vol.

Democrat
83%

Republican
18%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 5:07 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...Incumbent Democrat Gary Peters' retirement has created an open Michigan Senate seat in this battleground state, rated a tossup by forecasters like Cook Political Report amid a Republican Senate majority and Trump's 2024 presidential win here. Yet trader consensus prices a Democratic victory at 83%, driven by historical midterm headwinds for the president's party—GOP losses averaged 3.5 Senate seats in recent cycles—and Democrats' streak of three straight Michigan Senate wins, including Elissa Slotkin's 2024 triumph over Mike Rogers. Recent March polls show a tight Democratic primary among Rep. Haley Stevens (27%), Sen. Mallory McMorrow (25%), and Abdul El-Sayed (23%) ahead of the August 4 contest, with general hypotheticals narrowly favoring or tying leading Democrats against Rogers. Fundraising remains competitive, with no major shifts in the past 30 days.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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